MOTION VECTOR DETECTOR

摘要

PROBLEM TO BE SOLVED: To reduce the power consumption of a motion vector detector. SOLUTION: As to an image consisting of plural pixels and a block having the same number of a pixel as a pixel of an image processor elements PE0-PE255 connected in cascade calculate an absolute value of a difference of data among corresponding pixels each other and accumulate and sum-up the absolute values of the differences of the respective pixels. The above arithmetic operation is applied to every block within a prescribed retrieval range. A comparison means 305 compares the accumulated sums of two blocks obtained sequentially through the processor element PE 255 of a final stage and selects repetitively the accumulated sum of a smaller value. A subtractor 313 compares the selected accumulated sum with a setting value stored in a register 314 and when the accumulated sum is less than the setting value, a control circuit 320 stops the supply of a clock signal to the processor elements PE0-PE255 and the comparison means 305 and the operation of the succeeding entire devices stops.